diff --git a/.github/workflows/pythonapp.yaml b/.github/workflows/pythonapp.yaml
index f499dbcb..d2844cfb 100644
--- a/.github/workflows/pythonapp.yaml
+++ b/.github/workflows/pythonapp.yaml
@@ -22,7 +22,7 @@ jobs:
       - name: Remove cached duckdb extensions
         run: rm -rf ~/.duckdb
       - name: Install poetry
-        run: python -m pip install poetry pip -U
+        run: python -m pip install 'poetry<1.5.0' pip -U
       - name: Set up Python ${{ matrix.python }}
         uses: actions/setup-python@v4
         with:
diff --git a/duckdb_engine/datatypes.py b/duckdb_engine/datatypes.py
index 0be83354..239b14fe 100644
--- a/duckdb_engine/datatypes.py
+++ b/duckdb_engine/datatypes.py
@@ -104,9 +104,6 @@ class Map(TypeEngine):
     "timestamp_ms": sqltypes.TIMESTAMP,
     "timestamp_ns": sqltypes.TIMESTAMP,
     "enum": sqltypes.Enum,
-    "list": lambda: sqltypes.ARRAY(sqltypes.NULLTYPE),
-    "struct": Struct,
-    "map": Map,
 }
 
 
diff --git a/duckdb_engine/tests/test_datatypes.py b/duckdb_engine/tests/test_datatypes.py
index 87f2c76c..9d47e3c1 100644
--- a/duckdb_engine/tests/test_datatypes.py
+++ b/duckdb_engine/tests/test_datatypes.py
@@ -106,7 +106,11 @@ def test_all_types_reflection(engine: Engine) -> None:
         conn.execute(text("create table t2 as select * from test_all_types()"))
         table = Table("t2", MetaData(), autoload_with=conn)
         for col in table.columns:
-            if col.name.endswith("_enum") and duckdb.__version__ < "0.7.1":  # type: ignore[attr-defined]
+            name = col.name
+            if name.endswith("_enum") and duckdb.__version__ < "0.7.1":  # type: ignore[attr-defined]
                 continue
-            assert col.type != sqltypes.NULLTYPE, col.name
+            if "array" in name or "struct" in name or "map" in name:
+                assert col.type == sqltypes.NULLTYPE, name
+            else:
+                assert col.type != sqltypes.NULLTYPE, name
         assert not capture
diff --git a/tox.ini b/tox.ini
index 7b693edc..b9a59fdb 100644
--- a/tox.ini
+++ b/tox.ini
@@ -3,7 +3,8 @@ envlist = py{37,38,39,310}-{mypy,duckdb040,duckdb051,duckdb061,duckdb071}-sqlalc
 isolated_build = True
 requires =
     tox-gh-actions
-    tox-poetry-installer[poetry]
+    tox-poetry-installer
+    poetry<1.5.0
 
 [gh-actions]
 python =